I am importing data from dbase into sql and am using the following connection string to read data:
"Provider=Microsoft.Jet.OLEDB.4.0;" + #"Data Source=D:\GS\Source;"
+ "Extended Properties=dbase 5.0;User ID=Admin;Password=;"
The data is read successfully but i find that it includes DELETED rows too. as per dbase, there will be an asterisk as the first character, however we find that neither the file is excluded nor is the asterisk coming as a column.
So how do we load data without this deleted records?
Actually, deleted records are internally marked with a flag and not an "*" that you can query from. However, VFP does have a function to test this deleted flag, but only really applicable if running from a single table and not multiple/joins as it won't know which table you are wondering out... Ex:
select * from YourTable where not deleted()
That being said, VFP has some other "environment" setting commands that MAY work via the OleDB, but I've never actually tried THIS.
Once you have your connection, and it's open, run the following ExecNonQuery might help...
OleDbCommand oCmdTest = new OleDbCommand( "SET DELETED OFF", YourConnection );
OCmdTest.ExecuteNonQuery();
oCmdTest = new OleDbCommand( "Select * from YourTable", YourConnection );
execute it into a data table result set as you are, and you should be good.
One other part. I would not be using the Jet OleDB, but actually using the Microsoft VFP OleDb driver
In dBase after delete command 'pack all' has to be given so that the deleted records are
removed permanently.
If you have access to dBase use the concerned file and then give pack all command
Related
Windows 10, Access 2016
I am moving a very small database (14 tables and 40-50 stored procedures) from SQL Server to Access. I have tried to recreate the stored procedures from code using an OLEDB command object. This is a sample of a CommandText…
CREATE PROCEDURE DeleteOrderDetailByOrderID
([#ID] int)
AS
DELETE FROM OrderDetails
WHERE (OrderID = #ID);
I get an error message that the Data Type of #ID is incorrect. It is not. When I remove the brackets from #ID all is forgiven and the code runs. However, Access strips the # from #ID in the parameter section (not in the Where clause). I have had to go into Access and manually correct this. I do not like the idea of going through almost 5000 lines of code to correct parameter names in my program. I thought I could use the direct approach by pasting the SQL directly into Access but I get an error with this route saying syntax error in CREATE TABLE and it highlights the word PROCEDURE. This leads me to believe that you cannot use CREATE PROCEDURE directly in Access. Is this true? Is there another approach that I am missing?
You are missing, that T-SQL of SQL Server is not Access SQL.
Access has UDFs - user defined functions - that can be used in queries also, but that is VBA code.
If you just need a single-user file based database to hold your data, you may get away with the SQL Server Compact Edition which supports a subset of T-SQL.
I was using UniDac for a long time now and decided to move on to FireDac as it has good Asynch methods after moving on i saw that none of my data editing works anymore it gives me an error:
[FireDAC][Phys]-330. Cannot generate update query. Update table undefined.
What I am trying to do here is i have a TFDStoredProc component who gets all the data from the database and lets me edit it, with unidac I could easily edit the data without any problem like this:
StoredProc.Edit;
StoredProcCreatedID.Value := SomeValue;
StoredProc.Post;
and it worked, but with AnyDac it doesn't, I tried specifying manually the UpdateTable which leads to another problem:
[FireDAC][Phys][ODBC][Microsoft][SQL Server Native Client 11.0][SQL Server]Invalid column name 'CreatedID'.
I am using Microsoft SQL Server 2012 FireDac 8.0 and stored procedures for getting back results any ideas?
P.S.
The query looks like this
SELECT
CreatedBy as CreatedID,
usr.UserName as CreatedBy
FROM
Sales
LEFT JOIN
Users usr ON usr.ID = Sales.CreatedBy
it looks like the FireDac update builder doesn't recognize the aliases on the fields, any help would be appreciated.
Well i figured out what was the issue, it seems that if you specify a alias in the query for a field the Origin property will be set to the alias and not the real field i downloaded CNPack a must have for a delphi developer also its free, ran the component selector and changed all my aliased fields to their real fields and it works, but this is still a big issue in FireDac component because it doesnt recognize the aliased fields, lets hope it will be fixed in the future as to specify for every query what table it should update and what fields that just allot of work if you are migrating from a big project in my case 220+ stored procedures.
I'm trying to get our current database to use FTS. I recompiled the project with FTS3 and FTS4 support on. I know this part works since I've tried some of the examples off of the sqlite pages and they work.
e.g.
CREATE TABLE t2(id INTEGER PRIMARY KEY, a, b, c);
CREATE VIRTUAL TABLE t3 USING fts4(content="t2", a, c);
What I want to do is add a Virtual table to a .db that is already saved to the documents directory of our app. It is writeable.
My question is multi part. First, I tried my query in Firefox's add-on SQLite manager. My query is this:
CREATE VIRTUAL TABLE VirtualTestTable USING fts4(content=Chromosomes, ID Integer Primary Key Autoincrement, rsID, ChrID, Position, Strand, GeneSymbol)
Once I run this in sqlite manager, it creates a few different tables (VirtualTestTable, VirtualTestTable_docsize, VirtualTestTable_segdir, VirtualTestTable_segments, VirtualTestTable_stat).
So I assume sqlite manager supports FTS4. My table is also populated with the data that was original in my Chromosomes Table. But when I try to match anything in the table, I always get zero results. So my first question is, does sqlite manager support FTS queries?
My other question, which is more important to me, is if my query works in sqlite manager, I try this query in my Xcode project with different variations of
content='Chromosomes'
content=\"Chromosomes\"
content=Chromosomes
I always get an error with my query. I'm using FMDB and using the executeUpdate: message. My error is:
Error calling sqlite3_step (1: SQL logic error or missing database) SQLITE_ERROR
Unknown error finalizing or resetting statement (1: unrecognized parameter: content=Chromosomes)
Does anyone know why I'm getting this error? I don't think it's a missing database as when I try to just create an empty Virtual table on my fmdatabase, it runs fine. Thanks.
FTS queries work just fine in SQL Manager:
CREATE VIRTUAL TABLE t USING FTS4(x);
INSERT INTO t VALUES('blah');
INSERT INTO t VALUES('blubb');
SELECT * FROM t WHERE x MATCH 'bl*';
The error message "unrecognized parameter: content=" is typical for SQLite versions that do not support contentless/external content tables, i.e., ones older than 3.7.11.
I'm using Firebird 2.5.0 with the Entity Framework, which has been working well. However, recently I have changed something (I presume) and now the SQL that is being generated when I try to save my changes is not valid for Firebird:
update ( select [fields] from [table]) set [field] = #p0 where ([keyfieldn = #pn])
As far as I know, Firebird 2.5.0 does not support this syntax, and when I try to save changes I get back a SQL error that says as much ( "Token unknown, column 8: (" )
I'm not sure what to do now. What would cause the UpdateTranslator instance to generate this SQL instead of whatever it must have been generating before I broke it?
I went back through the edmx file and found that I had gotten some 'DefiningQuery' elements when I had it pull in some new fields from the database. I couldn't find any way to access those settings in the interface, so I just deleted them from the file and it is working correctly again.
i have added another input parameter to a stored proc used by a crystal report. i've had our dba recompile the stp to be sure that the new parameter is cached and "really there".
i cannot get my crystal report to recognize the new parameter -- i've tried verifying database and using the Set Datasource Location/Update to re-select the stp.
i'm using cr11 against a 2005 sql server db.
any other suggestions?
right click stored procedure click verify database then Press Cancel Button that will do the trick...^^
I'd try these in order:
1) verify the database, then test for new parameter
2) check using sql server management studio that the parameter is really there.
3) close crystal reports and reopen & verify database, then test for new parameter
4) close crystal reports remove data source, add data source back, and reopen crystal & verify database, then test for new parameter
5) reboot and then try #3
Have you tried removing and adding the data source?
Usually verify DB works, but have had a couple cases where I had you remove and add again.